Means for utilizing compressed air.



No. 706,653. Patented Aug. l2, I902.

E. HAYWARD.

MEANS FOR UTILIZING COMPRESSED AIR.

(Application filed Feb. 15, 1901. v

' 2 Sheets-Sheet I.

(No Model.) I

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No. 706,653. Patented Aug. l2, I902.

E. HAYWARD. MEANS FOR UTILIZING CDIIPBESSED'AIR.

(Application filed Feb. 15, 1901.) (N6 Modal.) 2 8heets$heei 2.

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' UNITED STATES PATENT OFFICE.

EUGENE HAYWARD, OF CHICAGO, ILLINOIS, AssIeNoEoE TWO-THIRDS TO JOHN T.LUEDER AND JOHN B. MORRIS, OF CHICAGO, ILLINOIS.

=MEANS FOR UTILIZINGICOMPRESSED AIR.

SPECIFICATION forming part of Letters Patent No. 706,653, dated August12, 1902.

' Application filed February 15, 1901. Serial No. 47.490. (No model.)

that the following is a full, clear, and exact description thereof,reference being had to IO the accompanying drawings, and to the lettersof reference marked thereon, which form av part of this specification.

This invention relates to means for utilizing compressed air, and moreparticularly for utilizing compressed air in steam-boilers or the like.

The object of the invention is to provide means for subjectingcompressed air to a high temperature and admitting the same into asteam-boiler, either continuously or at intervals, when a special loadis placed upon an engine and high pressure is desirable.

The invention consists of the matters hereinafter described, and morefully pointed out and defined in the appended claims.

In the drawings, Figure 1 is a plan view, partly diagrammatic, of adevice embodying my invention. Fig. 2 is an enlarged plan View of thecompressingapparatus. Figs. 3 and 4 are sectional views of thesteam-boiler, illustrating means for heating the air and admitting thesame to the boiler. Fig. 5 is a longitudinal section of the coil; Fig. 6is a crosssection of the same. Fig. 7 is a longitudinal section of thecom pressdr. Fig. Sis a section taken through one ofthecompressing-cylinders. Fig. 9 is a vertical section of one of thesmall valves employed in my invention. Fig. 10 is a plan view of theshoe. Fig. 11

is a longitudinal section of the same.

In the drawings, in which my invention is shown applied to the boiler ofa locomotive, A indicates the boiler, of the usual or any desiredconstruction.

13 indicates a portion of one of the tendertrucks, showing one of thetrack-wheel axles B journaled therein in afamiliar manner and havingsecured thereon the sprocket Wheels or'pulleys b 19, over which aretrained the chains 1) b, which are also trained around similar wheels orpulleys on a shaft journaled V on the under side of the tender, whichhas rigidly secured thereon the cylindric cam 0.

DD indicate the compressing-cylinders,

also supported on the under side of the tender and comprising twocylinders longitudinally in alinement and into which extends thepistonrod d, the ends of which within said cylinders are each providedwith a pistonhead d, as shown'in Fig. 7. 'Inlet-ports (1 d andoutlet-ports d d are provided at each end of each of said cylinders,each of which is provided with an automatic valve which permits the airto flow in but one directionthat is to say, inwardly through theinletports and outwardly through the outlet-ports. Any automatic valvemay be used, as preferred. As shown, however, a ball-valve, such asillustrated in Fig.' 9, is employed.

Means are provided for reciprocating the piston-rod, comprising a shoe dpivoted on said piston-rod transversely of the same, as

indicated in Fig.7,and which fits in the peripheral groove of the saidcylindric cam O.

Said cam-groove is continuous and extends longitudinally of the cylinderand twice around the same, as indicated in Fig. 2. The

rotation of saidcylinder acts to give the piston-rod a relatively longstroke, thereby forcing air alternately from opposite ends of eachcylinder into the delivery-pipes D D, which connect with theservice-pipe E. The service-pipe leads inwardly from the cylinder to thefire-box of the boiler and, as shown in Figs. 3 and 4, is admittedthereto beneath the fire-door and into a fitting e, of cast-iron or thelike, providedwith an internal coil, as shown in Figs. 3, 5, and 6. Forthe purpose of protecting said casting or fitting e from injury by theintense heat of the furnace a removable casing e, of fire-brick or othersuitable material, is provided, which, together with said casting orfitting c, rests upon the grate-bars and incloses said casting on itsupper and inner sides. From the delivery 5 end of said coil extends apipe 0 which leads upwardly to the domeof the boiler. As shown, saidpipe leads upwardly on the outside of the boiler; but obviously the samemay be contained wholly within the boiler I00 and fire-box and leadinwardly to the steamdome. Said pipe e may be provided with a valve,whereby air will be excluded from the boiler or admitted thereto, asdesired by the operator, or a check-valve may be providedsimilar tothose heretofore described, or of any desired kind, which acts to admitthe air under pressure into the boiler when the pressure of the steamfalls below a given point. Such a valve is indicated by e in the pipe 6The operation of my device, is as follows: A locomotive-engine having mydevice applied thereto in running either backward or forward rotates thecylinder and compresses the air within the cylinders, as beforedescribed. The air thus compressed flows through the pipe E to thefitting or casting e and is there. heated to a very high temperature bythe furnace, thereby-greatly expanding the same and increasing thepressure thereof. Thus heated the same is admitted to the dome, thereby,together with the expansive efiect of the steam in the boiler, aiding todrive the engine. Obviously any desired safety-valve may be employed onsaid cylinders, and, if preferred, devices may be connected therewithwhereby the same may be operated only when desired by theengineair-compressor, the pipe leading therefrom to the dome of theboiler and a bend or bends of said pipe incased or jacketed in metal andextending into and transversely of the fire-box near the rear endthereof and exposed to the maximum direct heat.

3. The combination with a steam-boiler, of a double-actingair-compressor, means for actuating said compressor, a pipe connectedtherewith and adapted to deliver compressed air to the dome of saidboiler and means for heating the compressed air before delivery in thedome, comprising a coil in said pipe located in and transversely of thefurnace of said boiler and a valve in the connection acting to regulatethe flow of said compressed air to the boiler.

4. In a device of the class described, the combination with alocomotive-boiler, of a compressor secured beneath the tender or thelike, means operated from a truck-axle for actuating said compressor, apipe leading therefrom through transversely of the firebox of the boilerto the dome thereof, said pipe being cased in metal and exposed tomaximum heat, whereby the air is first compressed then heated and thendelivered within the boiler.

5. The combination with a steam-boiler of a coil located transversely inthe fire-box or furnace thereof adjacent to and below the firedoor saidcoil comprising a tube bent to the desired shape and cased in cast metaland a protecting-covering on said coil.

In witness whereof I have hereunto subscribed my name in the presence oftwo subscribing witnesses.

EUGENE HAYWARD.

Witnesses:

JOHN B. MORRIS, JOHN T. LUEDER.

